2.情态动词的被动语态: 情态动词 + be +及物动词的过去分词

 否定式:是在助动词 be 或情态动词后加not构成

疑问式:是把上述助动词或情态动词提到主语之前,句尾加问号构成.             

结构:1.行为动词的被动语态: 助动词be + 及物动词的过去分词.

be有人称.时态.数的变化,其变化规则与be作为连系动词时完全一样.

 一般现在时 am/is/are+及物动词的过去分词      一般过去时 was/were +及物动词的过去分词

一般将来时 will +be +及物动词的过去分词   现在完成时 have/has+been+及物动词的过去分词            

  6.The baby will cry if she ___ (not see) her mother

动词的语态

动词的语态---表示谓语与主语之间的关系的动词形式叫做语态，分为主动语态和被动语态。

主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者

   5.____they____ (know) each other when they were young?                 

  4.--Where ___ you___ (be)?   --I'm looking for you all the time. 

  3.I'm afraid I ___ (keep) you waiting for such a long time.               

  2.Who's Jack London? I ___ never ____ (hear) of that man before.               

思考题：   1.I____(leave)my ruler at home. Can I use yours?             

  练习题：  1.They were so pleased to see each other that they almost ____ (forget) everything else around.     2. The girl put on her dress and then _______ (go) to the mirror to look at herself.  

  4.时间或条件状语从句中,若主句是一般将来时或祈使句,从句要用一般现在时代替将来时.

  eg.Stop talking when the headteacher ______(walk)into the classroom.

  Jim won't watch TV until he ___ (finish) his homework every time.